linux-kernel - Re: [PATCH 1/2] riscv: Fix sparse warning in __get_user

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Message-ID: <c7f5a944-0abf-8696-217b-4fee650ca96a@kernel.org>
Date: Fri, 19 Sep 2025 18:55:28 -0600 (MDT)
From: Paul Walmsley <pjw@...nel.org>
To: Alexandre Ghiti <alexghiti@...osinc.com>
cc: kernel test robot <lkp@...el.com>, Al Viro <viro@...iv.linux.org.uk>, 
    Paul Walmsley <paul.walmsley@...ive.com>, 
    Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
    Alexandre Ghiti <alex@...ti.fr>, Cyril Bur <cyrilbur@...storrent.com>, 
    Jisheng Zhang <jszhang@...nel.org>, linux-riscv@...ts.infradead.org, 
    linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 1/2] riscv: Fix sparse warning in __get_user_error()

On Wed, 3 Sep 2025, Alexandre Ghiti wrote:

> We used to assign 0 to x without an appropriate cast which results in
> sparse complaining when x is a pointer:
> 
> >> block/ioctl.c:72:39: sparse: sparse: Using plain integer as NULL pointer
> 
> So fix this by casting 0 to the correct type of x.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202508062321.gHv4kvuY-lkp@intel.com/
> Fixes: f6bff7827a48 ("riscv: uaccess: use 'asm_goto_output' for get_user()")
> Cc: stable@...r.kernel.org
> Signed-off-by: Alexandre Ghiti <alexghiti@...osinc.com>
> ---
>  arch/riscv/include/asm/uaccess.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Thanks, this one was sent upstream as part of the last fixes PR.

- Paul